Apostolos Gioulis
Senior Application Security Engineer
London, England, United Kingdom
Summary
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Senior🎓
Top SchoolApostolos Gioulis is a Senior Application Security Engineer based in London with over a decade of hands-on experience building and maturing AppSec programs across startups and global consultancies. He combines deep technical skills—especially in Android security, malware reverse engineering, CI/CD-integrated mobile scanning, and secure architecture—with proven leadership in training, team building, and process design. At Bumble he revived and automated the MAST program, slashing backlog by over 80%, and at Xenios he helped drive ISO 27001 readiness while architecting secure systems from the ground up. His background includes leading large distributed teams, creating training pipelines for junior pentesters, and operating in highly classified environments during military service. Continually curious and practical, he pairs academic rigor (Distinction in Information Security from Royal Holloway) with an uncommon hobby as a part-time blacksmith, reflecting a hands-on, craft-oriented approach to both security and problem-solving.
11 years of coding experience
7 years of employment as a software developer
Bachelor’s Degree, Informatics and Telecommunications, 7.06 (2:1), Bachelor’s Degree, Informatics and Telecommunications, 7.06 (2:1) at University of AthensMaster’s Degree, Information Security, Graduated with distinction, Master’s Degree, Information Security, Graduated with distinction at Royal Holloway, University of London
English, French, Greek, Spanish
Github Skills (83)
mod-manager9
javascript9
file-sharing9
freedesktop9
vms9
collaboration9
closed9
h2649
circuit9
zoneminder9
self-hosting9
php9
openipc9
nextcloud9
owncloud9
Programming languages (10)
Github contributions (5)
gioulisapo/Android-Automation
Feb 2017 - Mar 2017
Contributions:27 commits, 23 pushes, 1 branch in 7 days
gioulisapo/Typing-Assistant
Mar 2015 - Jul 2015
Contributions:13 commits, 12 pushes, 1 branch in 3 months
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